Posted by Michelle on Sunday, April 1, 2012 at 1:40pm.
A typical human newborn weighs 150lbs, while a newborn weighs approx 7lbs. An adult Western grey Kangaroo weighs about 30 kilograms and gives birth to babies who are approx 1 gram. If human babies were proportionally the same weight to adults as Western grey kangaroo babies, how much would a human newborn weigh?

Math  Ms. Sue, Sunday, April 1, 2012 at 1:55pm
Please proofread your question and repost.

Math  Michelle, Sunday, April 1, 2012 at 2:01pm
that is word for word what the questions says. It also says that there is one number in the problem that you do not need for the ratio and that it confuses students. Also a reminder that there is 1000g in one kg

Math  Steve, Sunday, April 1, 2012 at 2:11pm
1g/30kg = x/150 lb
.001/30 = x/150
x = .005 lb = 0.08 oz
pretty tiny!
It doesn't matter what a newborn human weighs. We're figuring the weight ratio using the kangaroo.

Math  Michelle, Sunday, April 1, 2012 at 2:25pm
I kept doing 7/150. thanks for all your help, both of you!!
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